Basically copy coupon, view price history or create e-mail price alert. What is best price?
61 Keys, Cherry Switch (Blue Switch), Dual Mode(Bluetooth / USB Wired), RGB, Any 6 Keys, 290*100*39mm, 800mA Lithium Battery
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($48.44): 502C6B
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): d09482
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for MantisTek GK3-61 Mechanical Keyboard Blue Switch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).